Claddings for YAG single crystal high power fiber lasers

Randall S. Hay; Hyunjun Kim; Andrew Schlup; John Drazin; Kathryn Doyle; Benjamin Gray; Kent Averett; Cynthia Bowers

doi:10.1117/12.2648359

8 March 2023 Claddings for YAG single crystal high power fiber lasers

Randall S. Hay, Hyunjun Kim, Andrew Schlup, John Drazin, Kathryn Doyle, Benjamin Gray, Kent Averett, Cynthia Bowers

Proceedings Volume 12399, Solid State Lasers XXXII: Technology and Devices; 1239902 (2023) https://doi.org/10.1117/12.2648359
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Doped single-crystal YAG fibers used as single-mode lasers require claddings with precise refractive index and high thermal conductivity. Three cladding materials that use coextrusion of green cladding on fiber cores as an initial processing step are described: 1. Undoped YAG cladding, followed by sintering or hot isostatic pressing. 2. Ca₃Ga₂Ge₃O₁₂ garnet cladding that melts beneath 1400°C. 3. LiCa₂Mg₂As_3xV_3-3xO₁₂ garnet cladding that melts beneath 1100°C. Microstructures are characterized by TEM. Equipment and procedures are described. Garnet refractive index models are developed and validated to predict cladding refractive index. Advantages and disadvantages of the different claddings are compared.

Conference Presentation

Citation Download Citation

Randall S. Hay, Hyunjun Kim, Andrew Schlup, John Drazin, Kathryn Doyle, Benjamin Gray, Kent Averett, and Cynthia Bowers "Claddings for YAG single crystal high power fiber lasers", Proc. SPIE 12399, Solid State Lasers XXXII: Technology and Devices, 1239902 (8 March 2023); https://doi.org/10.1117/12.2648359

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